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研究了三辛基甲基氯化铵(MTAC)、三十二烷基三甲基氯化铵(TMAC)、十六烷基三甲基溴化铵(HTAB)、十八烷基三甲基溴化铵(OTAB)以及聚乙二醇(PEG-400)等5种相转移催化剂对苯乙烯-丁二烯-苯乙烯嵌段共聚物环氧化反应的影响。结果表明,MTAC的环氧化效果最好,当其质量分数为1.0%时,可使环氧化苯乙烯-丁二烯-苯乙烯嵌段共聚物(ESBS)的环氧基质量分数从18.1%提高到20.1%;HTAB和PEG-400有利于ESBS的环氧基质量分数的提高;而OTAB和TMAC由于自身较大的分子体积反而使ESBS的环氧基质量分数下降。傅里叶变换红外光谱分析表明,MTAC可以有效抑制环氧基开环副反应的发生。
The effects of trioctylmethylammonium chloride (MTAC), triacontanyltrimethylammonium chloride (TMAC), hexadecyltrimethylammonium bromide (HTAB), octadecyltrimethyl The effects of five kinds of phase transfer catalysts, such as ammonium bromide (OTAB) and polyethylene glycol (PEG-400), on the epoxidation of styrene-butadiene-styrene block copolymer were investigated. The results showed that the epoxidation effect of MTAC was the best. When the mass fraction of MTAC was 1.0%, the epoxy group mass fraction of epoxidized styrene-butadiene-styrene block copolymer (ESBS) % To 20.1%. HTAB and PEG-400 are good for the epoxy group of ESBS. However, OTAB and TMAC decrease the mass fraction of epoxy group of ESBS because of their larger molecular volume. Fourier transform infrared spectroscopy analysis showed that MTAC can effectively inhibit the occurrence of epoxy ring-opening side reactions.